Smoke detector



FIG. 1 is a front, top and left side perspective view of the smoke detector showing my new design;

FIG. 2 is a perspective view from bellow;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an opposite side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a front elevational view thereof. 

The ornamental design for a smoke detector, as shown and described. 